OPTIMIZED ANTENNAS FOR MOBILE COMMUNICATION BASE STATIONS J.R. Sanford1, J.- F. Ziircher and S. Robert3 ABSTRACT This is a synopsis of work conducted to improve the electrical and mechanical performance of antennas used for mobile communication base stations. To accomplish this we first consider the propagation characteristics to determine the optimal antenna pattern. In addition, the antennas me

DUAL BAND FREQUENCY SCANNED, HEIGHT FINDER ANTENNA J. Dayton Adams*, Martin J. Mannion*, Bradley S. Newton* ABSTRACT Recently, the Georgia Tech Research Institute completed the development of a frequency scanned antenna for height finding applications with the novel capability for simultaneous elevation scanning in two microwave bands. This feature allows simultaneous, independent, determinations

ANALYSIS LAJOS NAGY Abstract OF BODIES OF REVOLUTION ANTENNAS WITH CIRCUlAR GROUND PLANE The bodies of revolution antennas with circular ground plane can be found in many application such as broadband antennas. In such cases an exact knowledge of the input impedance and radiation pattern is required. This paper presents a rapid and accurate analysis method applicated at such geometries. Our me

C-BAND MICROSTRIP PLANAR ARRAY FOR SPACEBORNI MICROWAVE REMOTE SENSING V.K. Lakshmeesha*, v.V.,Srinivasan* V.Venkatesh*, s.pal* ABSTRACT: The C-Band synthetic Aperture Radar (SAR) , a payload element for microwave remote sensing satellites requires an antenna with special features such as high gain, a tapered shaped beam and low. side-lobes in the elevation plane and a narrow beamwidth in the az

DESIGN AND ELECTRICAL CHARACTERISTICS OF A COMPACT GREGORY OFFSET RADIO RELAY ANTENNA U. Leupelt. K.P. Gessner ABSTRACT The paper reports on the development of a new compact Gregory offset antenna (COA) for radio link applications. Design principles and electrical characteristics are discussed by example of a 2-m version of the dual polarized antenna for the combined frequency ranges 6.2 and 6.8

A Neural Kuan-Kin ABSTRACT Net Approach to Real-Time Wen-Hao Yang 2 Adaptive Array Chan, Po-Rong Chang 1 and A novel Hopfield-type neural net with a number of graded-response neurons is proposed for implementing the real-time adaptive antenna array, which are steered by updating the weights across the array in order to maximize the output signal-to-noise ratio. A fourth order Runge-Kutta si

FAST ARRAY SYNTESIS BY AN ITERATIVE FFT PROCEDURE S.J.Stirland* ABSTRACT A common requirement in the design of array and reflector antennas is to synthesize an aperture distribution which generates a best possible approximation to a given far field amplitude requirement. Many methods for the solution of this problem are in use, most of them based on optimisation procedures. The present paper'desc

ERROR BOUNDS DUE TO RANDOM NOISE IN CYLINDRICAL NEAR-FIELD MEASUREMENTS J. Romeu, L. Jofre ABSTRACT. The far field errors due to near field random noise are statistically bounded when performing cylindrical near to far field transform. In this communication, the far field noise variance it is expressed as a function of the measurement parameters and the near field noise variance. 

A Novel Class of Dielectrics for Microwave and High-Frequency Applications H. Eifert., A. Enders.., K. Friederich..., P. Marquardt."., R. Pelster.., F. Petzoldt. G. Nimtz.., ABSTRACT Metal-particles of the submicrometer size range are embedded in conventional dielectric materials. The resulting electromagnetic behavior of such a heterostructured dielectric shows novel properties which are of fun

Full band matching of E-plane steps in rectangular waveguide F. C. de Ronde., M. Mongiardo+, T. Rozzi"'* Abstract In this paper we present a simple technique for matching E-plane steps in rectangular waveguide over the full band. This technique is based on a systematic experimental procedures and analysis and takes advantages of the frequency behavior of two matching elements, one placed after